title: Spectroscopic properties and diode end-pumped 2.79 μm laser performance of Er,Pr:GYSGG crystal.
abstract: We demonstrate a 968 nm diode end-pumped Er,Pr:GYSGG (Gd₁.₁₇Y₁.₈₃Sc₂Ga₃O₁₂) laser at 2.79 μm operated in the pulse and continuous-wave (CW) modes. The lifetimes for the upper laser level ⁴I₁₁/ ₂ and lower level ⁴I₁₃/₂ are 0.52 and 0.60 ms, respectively. The laser produces 284 mW of power in the CW mode, corresponding to the optical-to-optical efficiency of 14.8% and slope efficiency of 17.4%. The maximum laser energy achieved is 2.4 mJ at a repetition rate of 50 Hz and pulse duration of 0.5 ms, corresponding to a peak power of 4.8 W and slope efficiency of 18.3%. These results suggest that doping deactivator Pr3+ ions can effectively decrease the lower-level lifetime and improve the laser efficiency.
authors.forename: Jiakang
authors.initials: J
authors.lastname: Chen
authors.forename: Dunlu
authors.initials: D
authors.lastname: Sun
authors.forename: Jianqiao
authors.initials: J
authors.lastname: Luo
authors.forename: Huili
authors.initials: H
authors.lastname: Zhang
authors.forename: Renqin
authors.initials: R
authors.lastname: Dou
authors.forename: Jingzhong
authors.initials: J
authors.lastname: Xiao
authors.forename: Qingli
authors.initials: Q
authors.lastname: Zhang
authors.forename: Shaotang
authors.initials: S
authors.lastname: Yin